CN103567650A - Optimization method for laser hot wire welding process - Google Patents
Optimization method for laser hot wire welding process Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
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Abstract
The invention discloses an optimization method for a laser hot wire welding process. The optimization method for the laser hot wire welding process comprises the following steps: establishing a wire feeding speed-heating current-laser power three-dimensional coordinate system; in the three-dimensional coordinate system, surveying and mapping a critical process parameter combination for fusing transition and continuous transition to obtain an ideal process parameter window upper bound surface; in the three-dimensional coordinate system, surveying and mapping a critical process parameter combination for continuous transition and top wire transition to obtain an ideal process parameter window lower bound surface; according to the ideal process parameter window upper bound surface and the ideal process parameter window lower bound surface, determining an ideal process parameter window for the continuous transition of a welding wire; in the ideal process parameter window, selecting the process parameter combinations, and performing laser hot wire welding to achieve the continuous transition of the welding wire. In the optimization method for the laser hot wire welding process, the wire feeding speed, the heating current and the laser power are used as process parameters to control transitions of laser hot wire welding, and the ideal process parameter window is defined by the critical process parameter combinations, so that the optimization method for the laser hot wire welding process has the advantages of simplicity in parameter control, high easiness in operation and high practicality.
Description
Technical field
The invention belongs to welding technology field, be specifically related to a kind of LASER HEAT wire welding tech optimization method.
Background technology
As shown in Figure 1, LASER HEAT wire bond utilizes the resistance heat that welding wire energising produces after welding wire heating, to send into the molten bath that laser energy forms again, reduced the dependence of wire melting to laser energy, not only reduced the required precision of welding wire and laser relative position, and promoted charging efficiency, be a kind of promising Technology of Laser Filler Wire Welding.Welding wire transition behavior is subject to the hot double influence of resistance heat and molten bath, is the key problem that affects welding process stability and welding quality.Welding wire transition behavior can be divided into three kinds of fusing transition, continuous transition and jackscrew transition, and wherein continuous transition is desirable, stable, the second best in quality transition.Therefore need badly and propose a kind of LASER HEAT wire welding tech optimization method, find out ideal technology parameter window and take that to control LASER HEAT wire bond be continuous transition.
Summary of the invention
The present invention is intended to solve and in prior art, exists LASER HEAT wire bond may cause for fusing transition or jackscrew transition the technical problem of poor welding quality.For this reason, the object of the invention is to propose a kind of LASER HEAT wire welding tech optimization method.
To achieve these goals, according to the LASER HEAT wire welding tech optimization method of the embodiment of the present invention, can comprise the steps: that A. sets up the three-dimensional system of coordinate that reference axis is respectively wire feed rate, heating current and laser power, the point in described three-dimensional system of coordinate represents the combination of process parameters of described LASER HEAT wire bond; B. test the critical process parameters combination that fusing transition and continuous transition occur welding wire, in described three-dimensional system of coordinate, obtain ideal technology parameter window upper bound curved surface; C. test the critical process parameters combination of welding wire generation continuous transition and jackscrew transition, in described three-dimensional system of coordinate, obtain ideal technology parameter window lower bound curved surface; D. according to described ideal technology parameter upper bound curved surface and described ideal technology parameter lower bound curved surface, determine the ideal technology parameter window of described welding wire generation continuous transition; In described ideal technology parameter window, choose combination of process parameters with E., carry out LASER HEAT wire bond, realize welding wire continuous transition.
According to the LASER HEAT wire welding tech optimization method of the embodiment of the present invention, using wire feed rate, heating current and laser power to control LASER HEAT wire bond transition behavior as technological parameter, by surveying critical process parameters combination, define ideal technology parameter window.It is simple that the method has the parameter of control, easy operating, practical advantage.
In addition, according to the LASER HEAT wire welding tech optimization method of the embodiment of the present invention, also there is following additional technical feature:
In one embodiment of the invention, step B specifically comprises: B1. adopts the end of the LASER HEATING welding wire of fixing laser power, test and be recorded in and under different wires feed rate, make welding wire that the required minimum heating current of fusing transition occurs, obtain two-dimentional the first wire feed rate-heating current curve corresponding to described fixing laser power; B2. repeating step B1, obtains two-dimentional the first wire feed rate-heating current curve corresponding to difference under different laser powers; With B3. by many described the first wire feed rate-heating current Drawing of Curves in described three-dimensional system of coordinate, obtain three-dimensional described ideal technology parameter window upper bound curved surface.
In one embodiment of the invention, in described the first wire feed rate-heating current curve, heating current and wire feed rate positive correlation.
In one embodiment of the invention, in described the first wire feed rate-heating current curve, square being directly proportional to described wire feed rate of heating current.
In one embodiment of the invention, under different laser powers, two-dimentional the first wire feed rate-heating current curve corresponding to difference overlaps.
In one embodiment of the invention, step C specifically comprises: C1. adopts the end of the LASER HEATING welding wire of fixing laser power, test and be recorded under different wires feed rate and make the required maximum heat current of welding wire generation jackscrew transition, obtain two-dimentional the second wire feed rate-heating current curve corresponding to described fixing laser power; C2. repeating step C1, obtains two-dimentional the second wire feed rate-heating current curve corresponding to difference under different laser powers; With C3. by many described the second wire feed rate-heating current Drawing of Curves in described three-dimensional system of coordinate, obtain three-dimensional described ideal technology parameter window lower bound curved surface.
In one embodiment of the invention, in described the second wire feed rate-heating current curve, heating current and wire feed rate positive correlation.
In one embodiment of the invention, in described the second wire feed rate-heating current curve, square being directly proportional to described wire feed rate of heating current.
In one embodiment of the invention, under different laser powers, the second wire feed rate-heating current curve of correspondence does not overlap respectively, wherein, and laser power and heating current negative correlation when wire feed rate is identical.
Additional aspect of the present invention and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present invention.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present invention and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 is the schematic diagram of the equipment of LASER HEAT wire welding tech;
Fig. 2 is the photographed images of targeted weld zone in LASER HEAT wire bond process;
Fig. 3 is the flow chart of the LASER HEAT wire welding tech optimization method of the embodiment of the present invention;
Fig. 4 is the schematic diagram of ideal technology parameter window of the LASER HEAT wire bond of the embodiment of the present invention;
Fig. 5 is the schematic diagram of two-dimentional the first wire feed rate-heating current curve under different laser powers; And
Fig. 6 is the schematic diagram of two-dimentional the second wire feed rate-heating current curve under different laser powers.
The specific embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
Problem to be solved by this invention is: a kind of LASER HEAT wire welding tech optimization method that can realize LASER HEAT wire bond welding wire continuous transition is provided, the method proposes to realize the mechanical property of welding wire continuous transition, this mechanical property can be for controlling welding process, can also be for judging the welding wire transition behavior under certain combination of process parameters.
For making those skilled in the art understand better the present invention, now in conjunction with Fig. 1 and Fig. 2, LASER HEAT wire welding tech of the present invention is introduced.As shown in Figure 1, the pre-welding place of mother metal delivered to welding wire by wire feeder 1 with certain wire feed rate.Controller 2 is controlled heater supplies 3 and is made welding wire by certain heating current, the welding wire heat that has a resistance be heated up, and wherein heater supply 3 electrode is connected with mother metal, and another electrode passes through welding wire ignition tip and is connected with welding wire.Laser instrument 4 is by the laser beam of the certain laser power welding region that aims at the mark, and this laser is the laser that defocuses with certain spot diameter.Wire tip is stretched in the molten bath of this laser formation, wire tip and laser spot center keep fixed range.The fuel factor of laser is further warming up to over welding wire condensing temperature wire tip.For the process of monitoring laser hot wire welding better, the temperature of double color infrared temperature measuring instrument 5 test wire tip is provided, and provides 6 pairs of wire tip melting behaviors of high-speed camera make a video recording and image pickup result is shown on the equipment such as computer 7.Fig. 2 shows the photographed images of targeted weld zone in certain moment LASER HEAT wire bond process, and wherein, wire tip can be divided into solid-state section and local melting section.Molten bath is the form after welding wire and mother metal fusing.
Through inventor's research, this quality factor that discovery affects welding wire fusing behavior is the wire melting position that welding wire temperature field determines.Wire melting position available feature point represents.First aspect: will be defined as characterizing the fusing Interim point of fusing transition apart from welding wire ignition tip certain length P1 point, the temperature of this fusing Interim point is designated as T
p1.Work as T
p1be greater than welding wire solidus temperature T
stime, now welding wire fuses outside molten bath, and fusing transition occurs, and welding wire transition is unstable.T
p1temperature is determined by resistance heat, directly related with welding wire resistivity, diameter, wire feed rate and electric current constant resistance thermal parameter.Second aspect: wire tip P2 point (P2 order position determined by welding wire initial elongation amount) is defined as characterizing to the jackscrew Interim point of jackscrew transition, the temperature of this jackscrew Interim point is designated as T
p2.Work as T
p2lower than welding wire liquidus temperature T
l, now solid-state welding wire cannot melt in time in molten bath, and solid-state welding wire immediate roof is touched bath wall, and jackscrew transition occurs, and welding wire transition is unstable.T
p2temperature determines by resistance heat and molten bath heat is common, except resistance heat parameter, directly related with the hot input parameter such as laser power, spot diameter and speed of welding.From above two aspects, the criterion of stablizing welding wire transition (continuous transition) can be expressed as: T
p1≤ T
sand T
p2>=T
l.And T
p1be subject to the impact of wire feed rate and heating current, T
p2be subject to the impact of wire feed rate, heating current and laser power.
Thus, the present invention proposes a kind of LASER HEAT wire welding tech optimization method, as shown in Figure 3, can comprise the following steps:
A. set up the three-dimensional system of coordinate that reference axis is respectively wire feed rate, heating current and laser power, the point in three-dimensional system of coordinate represents the combination of process parameters of LASER HEAT wire bond.
B. test the critical process parameters combination that fusing transition and continuous transition occur welding wire, in three-dimensional system of coordinate, obtain ideal technology parameter window upper bound curved surface.
C. test the critical process parameters combination of welding wire generation continuous transition and jackscrew transition, in three-dimensional system of coordinate, obtain ideal technology parameter window lower bound curved surface.
D. according to ideal technology parameter upper bound curved surface and ideal technology parameter lower bound curved surface, determine the ideal technology parameter window of welding wire generation continuous transition.As shown in Figure 4.The combination of process parameters that surpasses ideal technology parameter window upper bound curved surface can cause the transition that fuses, combination of process parameters lower than ideal technology parameter window lower bound curved surface can cause jackscrew transition, if choose the combination of process parameters between upper and lower two curved surfaces, can obtain stable welding wire transition.
E. in desirable mechanical property, choose combination of process parameters, carry out LASER HEAT wire bond, realize welding wire continuous transition.
According to the LASER HEAT wire welding tech optimization method of the embodiment of the present invention, using wire feed rate, heating current and laser power to control LASER HEAT wire bond transition behavior as technological parameter, by surveying critical process parameters combination, define ideal technology parameter window.It is simple that the method has the parameter of control, easy operating, practical advantage.
In one embodiment of the invention, step B specifically can comprise the following steps:
B1. adopt the end of the LASER HEATING welding wire of fixing laser power, testing and be recorded under different wires feed rate makes welding wire that the required minimum heating current of fusing transition, two-dimentional the first wire feed rate-heating current curve corresponding to laser power being fixed occur;
B2. repeating step B1, obtains two-dimentional the first wire feed rate-heating current curve corresponding to difference under different laser powers.As shown in Figure 5.
B3. by many first wires feed rate-heating current Drawing of Curve in three-dimensional system of coordinate, obtain three-dimensional ideal technology parameter window upper bound curved surface.
In one embodiment of the invention, in this first wire feed rate-heating current curve, heating current and wire feed rate positive correlation.The theoretical explanation of this rule is: for making welding wire realize fusing transition, when wire feed rate is larger, in the representation unit time, the welding wire of fusing is more, and needed resistance heat is larger, and required heating current is larger.Therefore the two is proportionate.
In one embodiment of the invention, in the first wire feed rate-heating current curve, square being directly proportional to wire feed rate of heating current.The theoretical explanation of this rule is: wire feed rate is faster, and it is more that the unit interval is melted the welding wire falling, and required resistance heat is more.According to Joule's law Q=I
2r, be easy to derive learn heating current square with the ratio of wire feed rate be definite value, meet square being directly proportional to wire feed rate of heating current.Based on this, when mapping the first wire feed rate-heating current curve, without the data that gather all sampled points, can be only by the data of the minimum current under a group or several groups of certain wires feed rate, draw out whole piece curve, further simplified optimization method.
In one embodiment of the invention, under different laser powers, two-dimentional the first wire feed rate-heating current curve corresponding to difference overlaps.The theoretical explanation of this rule is: because the point of laser beam heats is in wire tip (being jackscrew Interim point P2 place) but not fusing Interim point P1 place, so the not impact of Stimulated Light power of temperature of the Interim point P1 that fuses.The transition that fuses is to be caused by excessive resistance heat.As long as control wire feed rate and electric current, welding wire be heated to suitable temperature and just can avoid the transition that fuses.Based on this, when the curved surface of the mapping ideal technology parameter window upper bound, can be without surveying and drawing two-dimentional the first wire feed rate-heating current curve corresponding to difference under different laser powers, and only by the first wire feed rate under a certain laser power-heating current curve is drawn to whole curved surface along the translation of laser power reference axis, further simplified optimization method.
In one embodiment of the invention, step C specifically can comprise the following steps:
C1. adopt the end of the LASER HEATING welding wire of fixing laser power, test and be recorded in and under different wires feed rate, make the required maximum heat current of welding wire generation jackscrew transition, two-dimentional the second wire feed rate-heating current curve corresponding to laser power being fixed.
C2. repeating step C1, obtains two-dimentional the second wire feed rate-heating current curve corresponding to difference under different laser powers.As shown in Figure 6.
C3. by many second wires feed rate-heating current Drawing of Curve in three-dimensional system of coordinate, obtain three-dimensional ideal technology parameter window lower bound curved surface.
In one embodiment of the invention, in the second wire feed rate-heating current curve, heating current and wire feed rate negative correlation.The theoretical explanation of this rule is: for making welding wire realize jackscrew transition, when wire feed rate is larger, in the representation unit time, the welding wire of fusing is more, and needed resistance heat is larger, and required heating current is larger.Therefore the two is proportionate.
In one embodiment of the invention, in the second wire feed rate-heating current curve, square being directly proportional to wire feed rate of heating current.The theoretical explanation of this rule is: wire feed rate is faster, and it is more that the unit interval is melted the welding wire falling, and required resistance heat is more.According to Joule's law Q=I
2r, be easy to derive learn heating current square with the ratio of wire feed rate be definite value, meet square being directly proportional to wire feed rate of heating current.Based on this, when mapping the second wire feed rate-heating current curve, without the data that gather all sampled points, can be only by the data of the minimum current under a group or several groups of certain wires feed rate, draw out whole piece curve, further simplified optimization method.
In one embodiment of the invention, under different laser powers, the second wire feed rate-heating current curve of correspondence does not overlap respectively, wherein, and laser power and heating current negative correlation when wire feed rate is identical.The theoretical explanation of this rule is: jackscrew Interim point P2 place is subject to the double action of resistance heat and LASER HEATING.That is: first controlling resistance heat is heated to suitable temperature by welding wire, then provides remaining heat to make welding wire fusing in time in molten bath by molten bath.When therefore laser power is large, required heating current is less, and the two is negative correlation.
For making those skilled in the art understand better the present invention, below in conjunction with specific embodiment, be described further.
Certain LASER HEAT wire bond system adopts following welding condition: optical fiber laser: peak power output 2kW, wavelength 1.07 μ m, spot diameter 3mm.Double color infrared temperature measuring instrument: response spectrum 0.75-1.1 μ m, range 700-3000 ℃, sample frequency 20Hz, response time 10ms.High-speed camera: frame speed 250fps, aperture time 0.5ms.Mother metal is low carbon steel plate, and welding wire is austenitic stainless steel welding wire, diameter 1.2mm, and solidus and liquidus temperature are respectively 1398 and 1454 ℃.Constant-current supply, positive pole connects welding wire, and negative pole connects mother metal.LASER HEAT wire bond welding system as shown in Figure 1.Welding condition: welding wire initial elongation amount 35mm(ignition tip is to welding wire front end distance), 70 °, welding wire inclination angle (welding wire and mother metal surface angle), speed of welding 0.5m/min, chevilled silk is distance apart from 1mm(laser spot center to welding wire front end), laser power 1～2kW, wire feed rate 1～3m/min, heating current 0～120A.
First, fixed laser power is 2kW, wire feed rate 2m/min, and high-speed camera has been taken welding wire transition behavior when heating current changes to 120A from 0A.During I >=100A, welding wire fuses outside molten bath, is fusing transition, and welding process is unstable.During 55A≤I≤95A, welding wire is fusing in time in molten bath, and in whole welding process, welding wire transition is stablized, and is continuous transition.During I≤50A, welding wire cannot melt in time in molten bath, and solid-state wire tip and bath wall contact, and is jackscrew transition, and welding process is unstable.Judgement thus, during I=95A, the resistance heat that welding wire obtains approaches the maximum that guarantees welding wire continuous transition.The welding wire front end that during I=95A, high-speed camera is taken, observing welding wire local melting length is 3mm, melting length is completely 2mm.Welding wire local melting length is directly proportional to resistance heat, so 3mm can be used as the critical length of continuous transition, and, when local melting length surpasses 3mm, fusing transition occurs welding wire.Because welding wire bringing-up section total length is 35mm, infer thus the welding wire temperature (T apart from ignition tip 30mm place
30) while being 1398 ℃ of welding wire solidus temperatures, the critical condition of welding wire in continuous transition and fusing transition.Through double color infrared ray, find T
30=1395 ℃, illustrate and adopt T
301398 ℃ of > are rational as the criterion of fusing transition.If wire tip can not melt in molten bath, wire tip temperature is lower than welding wire liquidus curve, i.e. T
351454 ℃ of <, can adopt this criterion to differentiate whether welding wire transition behavior is jackscrew transition.To sum up, the criterion of welding wire continuous transition can be expressed as T
30≤ 1398 ℃ and T
35>=1454 ℃.For example, respective operations under other laser powers (1.2kW or 1.6kW) is omitted.
Secondly, for 1.2,1.6 and tri-laser powers of 2.0kW, 1A is changed to minimum step as heating current, recorded T in wire feed rate 1～3m/min
35the current value of=1454 ℃, and be depicted as different curves.When On The Current Value is positioned at curve below, welding wire is jackscrew transition.Near choosing respectively curve above and below, electric current carries out experimental verification, and the welding wire transition behavior under these parameters is carried out to high-speed camera observation, has verified and has predicted the outcome accurately and reliably.Along with the reduction of laser power, the current value that jackscrew transition occurs raises, i.e. jackscrew transition is caused jointly by resistance heat and molten bath heat.Resistance heat is heated to the uniform temperature lower than fusing point by welding wire front end, by molten bath heat, the welding wire in molten bath is heated to fusing, resistance heat is higher by the temperature of welding wire heating, and the molten bath heat that wire melting needs is fewer, can obtain stable welding wire transition under less laser power.
Finally, according to two steps above, can obtain the process window of welding wire continuous transition.The combination of process parameters that surpasses top-surface camber can cause the transition that fuses, and lower than the combination of process parameters of lower surface camber, can cause jackscrew transition, if choose the combination of process parameters between upper and lower two curved surfaces, can obtain stable welding wire transition.When good welding quality is stablized in acquisition, reach the double effects that improves welding wire cladding efficiency and reduce mother metal fire damage, solved the key technical problem of accurate control LASER HEAT wire bond welding wire continuous transition.
In description of the invention, it will be appreciated that, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the invention, the implication of " a plurality of " is two or more, unless otherwise expressly limited specifically.
In the description of this description, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present invention or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, to the schematic statement of above-mentioned term not must for be identical embodiment or example.And, the specific features of description, structure, material or feature can one or more embodiment in office or example in suitable mode combination.In addition, those skilled in the art can carry out combination and combination by the different embodiment that describe in this description or example.
Although illustrated and described embodiments of the invention above, be understandable that, above-described embodiment is exemplary, can not be interpreted as limitation of the present invention, and those of ordinary skill in the art can change above-described embodiment within the scope of the invention, modification, replacement and modification.
Claims (9)
1. a LASER HEAT wire welding tech optimization method, is characterized in that, comprises the following steps:
A. set up the three-dimensional system of coordinate that reference axis is respectively wire feed rate, heating current and laser power, the point in described three-dimensional system of coordinate represents the combination of process parameters of described LASER HEAT wire bond;
B. test the critical process parameters combination that fusing transition and continuous transition occur welding wire, in described three-dimensional system of coordinate, obtain ideal technology parameter window upper bound curved surface;
C. test the critical process parameters combination of welding wire generation continuous transition and jackscrew transition, in described three-dimensional system of coordinate, obtain ideal technology parameter window lower bound curved surface;
D. according to described ideal technology parameter upper bound curved surface and described ideal technology parameter lower bound curved surface, determine the ideal technology parameter window of described welding wire generation continuous transition; With
E. in described ideal technology parameter window, choose combination of process parameters, carry out LASER HEAT wire bond, realize welding wire continuous transition.
2. LASER HEAT wire welding tech optimization method as claimed in claim 1, is characterized in that, step B specifically comprises:
B1. adopt the end of the LASER HEATING welding wire of fixing laser power, test and be recorded in and under different wires feed rate, make welding wire that the required minimum heating current of fusing transition occurs, obtain two-dimentional the first wire feed rate-heating current curve corresponding to described fixing laser power;
B2. repeating step B1, obtains two-dimentional the first wire feed rate-heating current curve corresponding to difference under different laser powers; With
B3. by many described the first wire feed rate-heating current Drawing of Curves in described three-dimensional system of coordinate, obtain three-dimensional described ideal technology parameter window upper bound curved surface.
3. LASER HEAT wire welding tech optimization method as claimed in claim 2, is characterized in that, in described the first wire feed rate-heating current curve, and heating current and wire feed rate positive correlation.
4. LASER HEAT wire welding tech optimization method as claimed in claim 2 or claim 3, is characterized in that, in described the first wire feed rate-heating current curve, and square being directly proportional to described wire feed rate of heating current.
5. the LASER HEAT wire welding tech optimization method as described in claim 2-4, is characterized in that, under different laser powers, two-dimentional the first wire feed rate-heating current curve corresponding to difference overlaps.
6. LASER HEAT wire welding tech optimization method as claimed in claim 1, is characterized in that, step C specifically comprises:
C1. adopt the end of the LASER HEATING welding wire of fixing laser power, test and be recorded under different wires feed rate and make the required maximum heat current of welding wire generation jackscrew transition, obtain two-dimentional the second wire feed rate-heating current curve corresponding to described fixing laser power;
C2. repeating step C1, obtains two-dimentional the second wire feed rate-heating current curve corresponding to difference under different laser powers; With
C3. by many described the second wire feed rate-heating current Drawing of Curves in described three-dimensional system of coordinate, obtain three-dimensional described ideal technology parameter window lower bound curved surface.
7. LASER HEAT wire welding tech optimization method as claimed in claim 6, is characterized in that, in described the second wire feed rate-heating current curve, and heating current and wire feed rate positive correlation.
8. the LASER HEAT wire welding tech optimization method as described in claim 6 or 7, is characterized in that, in described the second wire feed rate-heating current curve, and square being directly proportional to described wire feed rate of heating current.
9. the LASER HEAT wire welding tech optimization method as described in claim 6-8, is characterized in that, under different laser powers, the second wire feed rate-heating current curve of correspondence does not overlap respectively, wherein, and laser power and heating current negative correlation when wire feed rate is identical.
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN113369697A (en) * | 2021-06-22 | 2021-09-10 | 深圳信息职业技术学院 | Laser polishing online detection system and method |
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